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Embeds. Props Viper007Bond. see #10337 

git-svn-id: http://svn.automattic.com/wordpress/trunk@12023 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
ryan 2009-10-13 17:04:22 +00:00
parent b2966fba30
commit 410fcc2e42
11 changed files with 775 additions and 4 deletions
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4
wp-admin/admin-ajax.php
View File

@ -124,6 +124,10 @@ case 'imgedit-preview' :
die();
break;
case 'oembed-cache' :
$return = ( $wp_embed->cache_oembed( $_GET['post'] ) ) ? '1' : '0';
die( $return );
break;
default :
do_action( 'wp_ajax_' . $_GET['action'] );
die('0');

8
wp-admin/includes/schema.php
View File

@ -313,7 +313,13 @@ function populate_options() {
'widget_rss' => array(),
// 2.8
'timezone_string' => ''
'timezone_string' => '',
// 2.9
'embed_useoembed' => 1,
'embed_autourls' => 1,
'embed_size_w' => '',
'embed_size_h' => 600,
);
// Set autoload to no for these options

36
wp-admin/options-media.php
View File

@ -44,7 +44,7 @@ include('admin-header.php');
<tr valign="top">
<th scope="row"><?php _e('Medium size') ?></th>
<td><fieldset><legend class="screen-reader-text"><span><?php _e('Medium size') ?></span></legend>
<td><fieldset><legend class="screen-reader-text"><span><?php _e('Medium size'); ?></span></legend>
<label for="medium_size_w"><?php _e('Max Width'); ?></label>
<input name="medium_size_w" type="text" id="medium_size_w" value="<?php form_option('medium_size_w'); ?>" class="small-text" />
<label for="medium_size_h"><?php _e('Max Height'); ?></label>
@ -54,7 +54,7 @@ include('admin-header.php');
<tr valign="top">
<th scope="row"><?php _e('Large size') ?></th>
<td><fieldset><legend class="screen-reader-text"><span><?php _e('Large size') ?></span></legend>
<td><fieldset><legend class="screen-reader-text"><span><?php _e('Large size'); ?></span></legend>
<label for="large_size_w"><?php _e('Max Width'); ?></label>
<input name="large_size_w" type="text" id="large_size_w" value="<?php form_option('large_size_w'); ?>" class="small-text" />
<label for="large_size_h"><?php _e('Max Height'); ?></label>
@ -65,6 +65,38 @@ include('admin-header.php');
<?php do_settings_fields('media', 'default'); ?>
</table>
<h3><?php _e('Embeds') ?></h3>
<table class="form-table">
<tr valign="top">
<th scope="row"><?php _e('oEmbed'); ?></th>
<td><fieldset><legend class="screen-reader-text"><span><?php printf( __('Use <a href="%s">oEmbed</a> to assist in rich content embedding'), 'http://codex.wordpress.org/oEmbed' ); ?></span></legend>
<label for="embed_useoembed"><input name="embed_useoembed" type="checkbox" id="embed_useoembed" value="1" <?php checked( '1', get_option('embed_useoembed') ); ?>/> <?php printf( __('Use <a href="%s">oEmbed</a> to assist in rich content embedding'), 'http://codex.wordpress.org/oEmbed' ); ?></label>
</fieldset></td>
</tr>
<tr valign="top">
<th scope="row"><?php _e('Auto-embeds'); ?></th>
<td><fieldset><legend class="screen-reader-text"><span><?php _e('Attempt to automatically embed all plain text URLs'); ?></span></legend>
<label for="embed_autourls"><input name="embed_autourls" type="checkbox" id="embed_autourls" value="1" <?php checked( '1', get_option('embed_autourls') ); ?>/> <?php _e('Attempt to automatically embed all plain text URLs'); ?></label>
</fieldset></td>
</tr>
<tr valign="top">
<th scope="row"><?php _e('Embed size') ?></th>
<td>
<label for="embed_size_w"><?php _e('Width'); ?></label>
<input name="embed_size_w" type="text" id="embed_size_w" value="<?php form_option('embed_size_w'); ?>" class="small-text" />
<label for="embed_size_h"><?php _e('Height'); ?></label>
<input name="embed_size_h" type="text" id="embed_size_h" value="<?php form_option('embed_size_h'); ?>" class="small-text" />
<?php if ( !empty($content_width) ) echo '<br />' . __("If the width value is left blank, embeds will default to the max width of your theme."); ?>
</td>
</tr>
<?php do_settings_fields('media', 'embeds'); ?>
</table>
<?php do_settings_sections('media'); ?>
<p class="submit">

2
wp-admin/options.php
View File

@ -25,7 +25,7 @@ $whitelist_options = array(
'general' => array( 'blogname', 'blogdescription', 'admin_email', 'users_can_register', 'gmt_offset', 'date_format', 'time_format', 'start_of_week', 'default_role', 'timezone_string' ),
'discussion' => array( 'default_pingback_flag', 'default_ping_status', 'default_comment_status', 'comments_notify', 'moderation_notify', 'comment_moderation', 'require_name_email', 'comment_whitelist', 'comment_max_links', 'moderation_keys', 'blacklist_keys', 'show_avatars', 'avatar_rating', 'avatar_default', 'close_comments_for_old_posts', 'close_comments_days_old', 'thread_comments', 'thread_comments_depth', 'page_comments', 'comments_per_page', 'default_comments_page', 'comment_order', 'comment_registration' ),
'misc' => array( 'use_linksupdate', 'uploads_use_yearmonth_folders', 'upload_path', 'upload_url_path' ),
'media' => array( 'thumbnail_size_w', 'thumbnail_size_h', 'thumbnail_crop', 'medium_size_w', 'medium_size_h', 'large_size_w', 'large_size_h', 'image_default_size', 'image_default_align', 'image_default_link_type' ),
'media' => array( 'thumbnail_size_w', 'thumbnail_size_h', 'thumbnail_crop', 'medium_size_w', 'medium_size_h', 'large_size_w', 'large_size_h', 'image_default_size', 'image_default_align', 'image_default_link_type', 'embed_useoembed', 'embed_autourls', 'embed_size_w', 'embed_size_h' ),
'privacy' => array( 'blog_public' ),
'reading' => array( 'posts_per_page', 'posts_per_rss', 'rss_use_excerpt', 'blog_charset', 'show_on_front', 'page_on_front', 'page_for_posts' ),
'writing' => array( 'default_post_edit_rows', 'use_smilies', 'ping_sites', 'mailserver_url', 'mailserver_port', 'mailserver_login', 'mailserver_pass', 'default_category', 'default_email_category', 'use_balanceTags', 'default_link_category', 'enable_app', 'enable_xmlrpc' ),

24
wp-includes/capabilities.php
View File

@ -959,6 +959,30 @@ function current_user_can( $capability ) {
return call_user_func_array( array( &$current_user, 'has_cap' ), $args );
}
/**
* Whether author of supplied post has capability or role.
*
* @since 2.9
*
* @param int|object $post Post ID or post object.
* @param string $capability Capability or role name.
* @return bool
*/
function author_can( $post, $capability ) {
if ( !$post = get_post($post) )
return false;
$author = new WP_User( $post->post_author );
if ( empty( $author ) )
return false;
$args = array_slice( func_get_args(), 2 );
$args = array_merge( array( $capability ), $args );
return call_user_func_array( array( &$author, 'has_cap' ), $args );
}
/**
* Retrieve role object.
*

236
wp-includes/class-oembed.php Normal file
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@ -0,0 +1,236 @@
<?php
/**
* API for fetching the HTML to embed remote content based on a provided URL.
* Used internally by the {@link WP_Embed} class, but is designed to be generic.
*
* @link http://codex.wordpress.org/oEmbed oEmbed Codex Article
* @link http://oembed.com/ oEmbed Homepage
*
* @package WordPress
* @subpackage oEmbed
*/
/**
* oEmbed class.
*
* @package WordPress
* @subpackage oEmbed
* @since 2.9.0
*/
class WP_oEmbed {
var $providers = array();
/**
* PHP4 constructor
*/
function WP_oEmbed() {
return $this->__construct();
}
/**
* PHP5 constructor
*
* @uses apply_filters() Filters a list of pre-defined oEmbed providers.
*/
function __construct() {
// List out some popular sites, mainly ones that don't have discovery tags in their <head>
// The WP_Embed class disables discovery for non-unfiltered_html users,
// so only providers in this array will be used for them.
$this->providers = apply_filters( 'oembed_providers', array(
'http://blip.tv/file/*' => 'http://blip.tv/oembed/',
'http://*.flickr.com/*' => 'http://www.flickr.com/services/oembed/',
'http://*.viddler.com/*' => 'http://lab.viddler.com/services/oembed/',
'http://qik.com/*' => 'http://qik.com/api/oembed.{format}',
'http://*.revision3.com/*' => 'http://revision3.com/api/oembed/',
'http://www.hulu.com/watch/*' => 'http://www.hulu.com/api/oembed.{format}',
// Vimeo uses the discovery <link>, so leave this commented to use it as a discovery test
//'http://www.vimeo.com/*' => 'http://www.vimeo.com/api/oembed.{format}',
) );
}
/**
* The do-it-all function that takes a URL and attempts to return the HTML.
*
* @see WP_oEmbed::discover()
* @see WP_oEmbed::fetch()
* @see WP_oEmbed::data2html()
*
* @param string $url The URL to the content that should be attempted to be embedded.
* @param array $args Optional arguments. Usually passed from a shortcode.
* @return bool|string False on failure, otherwise the UNSANITIZED (and potentially unsafe) HTML that should be used to embed.
*/
function get_html( $url, $args = '' ) {
$provider = false;
if ( !isset($args['discover']) )
$args['discover'] = true;
foreach ( $this->providers as $matchmask => $providerurl ) {
// Turn the asterisk-type provider URLs into regex
$regex = '#' . str_replace( '___wildcard___', '(.+)', preg_quote( str_replace( '*', '___wildcard___', $matchmask ), '#' ) ) . '#i';
if ( preg_match( $regex, $url ) ) {
$provider = str_replace( '{format}', 'json', $providerurl ); // JSON is easier to deal with than XML
break;
}
}
if ( !$provider && $args['discover'] )
$provider = $this->discover( $url );
if ( !$provider || false === $data = $this->fetch( $provider, $url, $args ) )
return false;
return apply_filters( 'oembed_output', $this->data2html( $data, $url ), $url, $args );
}
/**
* Attempts to find oEmbed provider discovery <link> tags at the given URL.
*
* @param string $url The URL that should be inspected for discovery <link> tags.
* @return bool|string False on failure, otherwise the oEmbed provider URL.
*/
function discover( $url ) {
$providers = array();
// Fetch URL content
if ( $html = wp_remote_retrieve_body( wp_remote_get( $url ) ) ) {
// <link> types that contain oEmbed provider URLs
$linktypes = apply_filters( 'oembed_linktypes', array(
'application/json+oembed' => 'json',
'text/xml+oembed' => 'xml',
'application/xml+oembed' => 'xml', // Incorrect, but used by at least Vimeo
) );
// Strip <body>
$html = substr( $html, 0, stripos( $html, '</head>' ) );
// Do a quick check
$tagfound = false;
foreach ( $linktypes as $linktype => $format ) {
if ( stripos($html, $linktype) ) {
$tagfound = true;
break;
}
}
if ( $tagfound && preg_match_all( '/<link([^<>]+)>/i', $html, $links ) ) {
foreach ( $links[1] as $link ) {
$atts = shortcode_parse_atts( $link );
if ( !empty($atts['type']) && !empty($linktypes[$atts['type']]) && !empty($atts['href']) ) {
$providers[$linktypes[$atts['type']]] = $atts['href'];
// Stop here if it's JSON (that's all we need)
if ( 'json' == $linktypes[$atts['type']] )
break;
}
}
}
}
// JSON is preferred to XML
if ( !empty($providers['json']) )
return $providers['json'];
elseif ( !empty($providers['xml']) )
return $providers['xml'];
else
return false;
}
/**
* Connects to a oEmbed provider and returns the result.
*
* @param string $provider The URL to the oEmbed provider.
* @param string $url The URL to the content that is desired to be embedded.
* @param array $args Optional arguments. Usually passed from a shortcode.
* @return bool|object False on failure, otherwise the result in the form of an object.
*/
function fetch( $provider, $url, $args = '' ) {
$args = wp_parse_args( $args, wp_embed_defaults() );
$provider = add_query_arg( 'format', 'json', $provider ); // JSON is easier to deal with than XML
$provider = add_query_arg( 'maxwidth', $args['width'], $provider );
$provider = add_query_arg( 'maxheight', $args['height'], $provider );
$provider = add_query_arg( 'url', urlencode($url), $provider );
if ( !$result = wp_remote_retrieve_body( wp_remote_get( $provider ) ) )
return false;
$result = trim( $result );
// JSON?
// Example content: http://vimeo.com/api/oembed.json?url=http%3A%2F%2Fvimeo.com%2F240975
if ( $data = json_decode($result) ) {
return $data;
}
// Must be XML. Only parse it if PHP5 is installed. (PHP4 isn't worth the trouble.)
// Example content: http://vimeo.com/api/oembed.xml?url=http%3A%2F%2Fvimeo.com%2F240975
elseif ( function_exists('simplexml_load_string') ) {
$errors = libxml_use_internal_errors( 'true' );
$data = simplexml_load_string( $result );
libxml_use_internal_errors( $errors );
if ( is_object($data) )
return $data;
}
return false;
}
/**
* Converts a data object from {@link WP_oEmbed::fetch()} and returns the HTML.
*
* @param object $data A data object result from an oEmbed provider.
* @param string $url The URL to the content that is desired to be embedded.
* @return bool|string False on error, otherwise the HTML needed to embed.
*/
function data2html( $data, $url ) {
if ( !is_object($data) || empty($data->type) )
return false;
switch ( $data->type ) {
case 'photo':
if ( empty($data->url) || empty($data->width) || empty($data->height) )
return false;
$title = ( !empty($data->title) ) ? $data->title : '';
return '<img src="' . esc_attr( clean_url( $data->url ) ) . '" alt="' . esc_attr($title) . '" width="' . esc_attr($data->width) . '" height="' . esc_attr($data->height) . '" />';
case 'video':
case 'rich':
return ( !empty($data->html) ) ? $data->html : false;
case 'link':
return ( !empty($data->title) ) ? '<a href="' . clean_url($url) . '">' . esc_html($data->title) . '</a>' : false;
}
return false;
}
}
/**
* Returns the initialized {@link WP_oEmbed} object
*
* @since 2.9.0
* @access private
*
* @see WP_oEmbed
* @uses WP_oEmbed
*
* @return WP_oEmbed object.
*/
function &_wp_oembed_get_object() {
static $wp_oembed;
if ( is_null($wp_oembed) )
$wp_oembed = new WP_oEmbed();
return $wp_oembed;
}

101
wp-includes/default-embeds.php Normal file
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@ -0,0 +1,101 @@
<?php
/**
* Default Embed Handlers
*
* @package WordPress
* @subpackage Embeds
*/
/**
* The YouTube.com embed handler callback. YouTube does not support oEmbed and we want to provide extra customization.
*
* @see WP_Embed::register_handler()
* @see WP_Embed::shortcode()
*
* @param array $matches The regex matches from the provided regex when calling {@link wp_embed_register_handler()}.
* @param array $attr Embed attributes.
* @param string $url The original URL that was matched by the regex.
* @param array $rawattr The original unmodified attributes.
* @return string The embed HTML.
*/
function wp_embed_handler_youtube( $matches, $attr, $url, $rawattr ) {
// If the user supplied a fixed width AND height, use it
if ( !empty($rawattr['width']) && !empty($rawattr['height']) ) {
$width = (int) $rawattr['width'];
$height = (int) $rawattr['height'];
} else {
list( $width, $height ) = wp_expand_dimensions( 425, 344, $attr['width'], $attr['height'] );
}
return apply_filters( 'embed_youtube', '<object width="' . esc_attr($width) . '" height="' . esc_attr($height) . '"><param name="movie" value="http://www.youtube.com/v/' . esc_attr($matches[3]) . '&amp;hl=en&amp;fs=1"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/' . esc_attr($matches[3]) . '&amp;hl=en&amp;fs=1" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="' . esc_attr($width) . '" height="' . esc_attr($height) . '"></embed></object>', $matches, $attr, $url, $rawattr );
}
wp_embed_register_handler( 'youtube', '#http://(www.youtube|youtube|[A-Za-z]{2}.youtube)\.com/(watch\?v=|w/\?v=|\?v=)([\w-]+)(.*?)#i', 'wp_embed_handler_youtube' );
/**
* The Google Video embed handler callback. Google Video does not support oEmbed.
*
* @see WP_Embed::register_handler()
* @see WP_Embed::shortcode()
*
* @param array $matches The regex matches from the provided regex when calling {@link wp_embed_register_handler()}.
* @param array $attr Embed attributes.
* @param string $url The original URL that was matched by the regex.
* @param array $rawattr The original unmodified attributes.
* @return string The embed HTML.
*/
function wp_embed_handler_googlevideo( $matches, $attr, $url, $rawattr ) {
// If the user supplied a fixed width AND height, use it
if ( !empty($rawattr['width']) && !empty($rawattr['height']) ) {
$width = (int) $rawattr['width'];
$height = (int) $rawattr['height'];
} else {
list( $width, $height ) = wp_expand_dimensions( 425, 344, $attr['width'], $attr['height'] );
}
return apply_filters( 'embed_googlevideo', '<embed type="application/x-shockwave-flash" src="http://video.google.com/googleplayer.swf?docid=' . esc_attr($matches[2]) . '&amp;hl=en&amp;fs=true" style="width:' . esc_attr($width) . 'px;height:' . esc_attr($height) . 'px" allowFullScreen="true" allowScriptAccess="always"></embed>', $matches, $attr, $url, $rawattr );
}
wp_embed_register_handler( 'googlevideo', '#http://video\.google\.([A-Za-z.]{2,5})/videoplay\?docid=([\d-]+)(.*?)#i', 'wp_embed_handler_googlevideo' );
/**
* The PollDaddy.com embed handler callback. PollDaddy does not support oEmbed, at least not yet.
*
* @see WP_Embed::register_handler()
* @see WP_Embed::shortcode()
*
* @param array $matches The regex matches from the provided regex when calling {@link wp_embed_register_handler()}.
* @param array $attr Embed attributes.
* @param string $url The original URL that was matched by the regex.
* @param array $rawattr The original unmodified attributes.
* @return string The embed HTML.
*/
function wp_embed_handler_polldaddy( $matches, $attr, $url, $rawattr ) {
return apply_filters( 'embed_polldaddy', '<script type="text/javascript" charset="utf8" src="http://s3.polldaddy.com/p/' . esc_attr($matches[1]) . '"></script>', $matches, $attr, $url, $rawattr );
}
wp_embed_register_handler( 'polldaddy', '#http://answers.polldaddy.com/poll/(\d+)(.*?)#i', 'wp_embed_handler_polldaddy' );
/**
* The DailyMotion.com embed handler callback. DailyMotion does not support oEmbed.
*
* @see WP_Embed::register_handler()
* @see WP_Embed::shortcode()
*
* @param array $matches The regex matches from the provided regex when calling {@link wp_embed_register_handler()}.
* @param array $attr Embed attributes.
* @param string $url The original URL that was matched by the regex.
* @param array $rawattr The original unmodified attributes.
* @return string The embed HTML.
*/
function wp_embed_handler_dailymotion( $matches, $attr, $url, $rawattr ) {
// If the user supplied a fixed width AND height, use it
if ( !empty($rawattr['width']) && !empty($rawattr['height']) ) {
$width = (int) $rawattr['width'];
$height = (int) $rawattr['height'];
} else {
list( $width, $height ) = wp_expand_dimensions( 480, 291, $attr['width'], $attr['height'] );
}
return apply_filters( 'embed_dailymotion', '<object width="' . esc_attr($width) . '" height="' . esc_attr($height) . '" classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000"><param name="movie" value="http://www.dailymotion.com/swf/' . esc_attr($matches[3]) . '&amp;related=0"></param><param name="allowFullScreen" value="true"></param><param name="allowScriptAccess" value="always"></param><embed src="http://www.dailymotion.com/swf/' . esc_attr($matches[3]) . '&amp;related=0" type="application/x-shockwave-flash" width="' . esc_attr($width) . '" height="' . esc_attr($height) . '" allowFullScreen="true" allowScriptAccess="always"></embed></object>', $matches, $attr, $url, $rawattr );;
}
wp_embed_register_handler( 'dailymotion', '#http://(www.dailymotion|dailymotion)\.com/(.+)/([0-9a-zA-Z]+)\_(.*?)#i', 'wp_embed_handler_dailymotion' );

1
wp-includes/default-filters.php
View File

@ -206,6 +206,7 @@ add_action('admin_print_footer_scripts', 'print_footer_scripts', 20);
add_action('admin_print_styles', 'print_admin_styles', 20);
add_action('init', 'smilies_init', 5);
add_action( 'plugins_loaded', 'wp_maybe_load_widgets', 0 );
add_action( 'plugins_loaded', 'wp_maybe_load_embeds', 0 );
add_action( 'shutdown', 'wp_ob_end_flush_all', 1);
add_action( 'pre_post_update', 'wp_save_post_revision' );
add_action('publish_post', '_publish_post_hook', 5, 1);

2
wp-includes/formatting.php
View File

@ -2358,6 +2358,8 @@ function sanitize_option($option, $value) {
case 'medium_size_h':
case 'large_size_w':
case 'large_size_h':
//case 'embed_size_w':
case 'embed_size_h':
case 'default_post_edit_rows':
case 'mailserver_port':
case 'comment_max_links':

14
wp-includes/functions.php
View File

@ -2741,6 +2741,20 @@ function wp_parse_args( $args, $defaults = '' ) {
return $r;
}
/**
* Determines if default embed handlers should be loaded.
*
* Checks to make sure that the embeds library hasn't already been loaded. If
* it hasn't, then it will load the embeds library.
*
* @since 2.9
*/
function wp_maybe_load_embeds() {
if ( ! apply_filters('load_default_embeds', true) )
return;
require_once( ABSPATH . WPINC . '/default-embeds.php' );
}
/**
* Determines if Widgets library should be loaded.
*

351
wp-includes/media.php
View File

@ -860,3 +860,354 @@ function wp_imagecreatetruecolor($width, $height) {
return $img;
}
/**
* API for easily embedding rich media such as videos and images into content.
*
* @package WordPress
* @subpackage Embed
* @since 2.9.0
*/
class WP_Embed {
var $handlers = array();
var $post_ID;
var $usecache = true;
var $linkifunknown = true;
/**
* PHP4 constructor
*/
function WP_Embed() {
return $this->__construct();
}
/**
* PHP5 constructor
*/
function __construct() {
// Hack to get the [embed] shortcode to run before wpautop()
add_filter( 'the_content', array(&$this, 'run_shortcode'), 8 );
// Attempts to embed all URLs in a post
if ( get_option('embed_autourls') )
add_filter( 'the_content', array(&$this, 'autoembed'), 8 );
// After a post is saved, cache oEmbed items via AJAX
if ( get_option('embed_useoembed') )
add_action( 'edit_form_advanced', array(&$this, 'maybe_run_ajax_cache') );
}
/**
* Process the [embed] shortcode.
*
* Since the [embed] shortcode needs to be run earlier than other shortcodes,
* this function removes all existing shortcodes, registers the [embed] shortcode,
* calls {@link do_shortcode()}, and then re-registers the old shortcodes.
*
* @uses $shortcode_tags
* @uses remove_all_shortcodes()
* @uses add_shortcode()
* @uses do_shortcode()
*
* @param string $content Content to parse
* @return string Content with shortcode parsed
*/
function run_shortcode( $content ) {
global $shortcode_tags;
// Backup current registered shortcodes and clear them all out
$orig_shortcode_tags = $shortcode_tags;
remove_all_shortcodes();
add_shortcode( 'embed', array(&$this, 'shortcode') );
// Do the shortcode (only the [embed] one is registered)
$content = do_shortcode( $content );
// Put the original shortcodes back
$shortcode_tags = $orig_shortcode_tags;
return $content;
}
/**
* If a post/page was saved, then output Javascript to make
* an AJAX request that will call WP_Embed::cache_oembed().
*/
function maybe_run_ajax_cache() {
global $post_ID;
if ( empty($post_ID) || empty($_GET['message']) || 1 != $_GET['message'] )
return;
?>
<script type="text/javascript">
/* <![CDATA[ */
jQuery(document).ready(function($){
$.get("<?php echo admin_url( 'admin-ajax.php?action=oembed-cache&post=' . $post_ID ); ?>");
});
/* ]]> */
</script>
<?php
}
/**
* Register an embed handler. Do not use this function directly, use {@link wp_embed_register_handler()} instead.
* This function should probably also only be used for sites that do not support oEmbed.
*
* @param string $id An internal ID/name for the handler. Needs to be unique.
* @param string $regex The regex that will be used to see if this handler should be used for a URL.
* @param callback $callback The callback function that will be called if the regex is matched.
* @param int $priority Optional. Used to specify the order in which the registered handlers will be tested (default: 10). Lower numbers correspond with earlier testing, and handlers with the same priority are tested in the order in which they were added to the action.
*/
function register_handler( $id, $regex, $callback, $priority = 10 ) {
$this->handlers[$priority][$id] = array(
'regex' => $regex,
'callback' => $callback,
);
}
/**
* Unregister a previously registered embed handler. Do not use this function directly, use {@link wp_embed_unregister_handler()} instead.
*
* @param string $id The handler ID that should be removed.
* @param int $priority Optional. The priority of the handler to be removed (default: 10).
*/
function unregister_handler( $id, $priority = 10 ) {
if ( isset($this->handlers[$priority][$id]) )
unset($this->handlers[$priority][$id]);
}
/**
* The {@link do_shortcode()} callback function.
*
* Attempts to convert a URL into embed HTML. Starts by checking the URL against the regex of the registered embed handlers.
* If none of the regex matches and it's enabled, then the URL will be given to the {@link WP_oEmbed} class.
*
* @uses wp_oembed_get()
* @uses wp_parse_args()
* @uses wp_embed_defaults()
* @uses WP_Embed::maybe_make_link()
* @uses get_option()
* @uses current_user_can()
* @uses wp_cache_get()
* @uses wp_cache_set()
* @uses get_post_meta()
* @uses update_post_meta()
*
* @param array $attr Shortcode attributes.
* @param string $url The URL attempting to be embeded.
* @return string The embed HTML on success, otherwise the original URL.
*/
function shortcode( $attr, $url = '' ) {
global $post, $_wp_using_ext_object_cache;
if ( empty($url) )
return '';
$rawattr = $attr;
$attr = wp_parse_args( $attr, wp_embed_defaults() );
// Look for known internal handlers
ksort( $this->handlers );
foreach ( $this->handlers as $priority => $handlers ) {
foreach ( $handlers as $id => $handler ) {
if ( preg_match( $handler['regex'], $url, $matches ) && is_callable( $handler['callback'] ) ) {
if ( false !== $return = call_user_func( $handler['callback'], $matches, $attr, $url, $rawattr ) )
return $return;
}
}
}
$post_ID = ( !empty($post->ID) ) ? $post->ID : null;
if ( !empty($this->post_ID) ) // Potentially set by WP_Embed::cache_oembed()
$post_ID = $this->post_ID;
// Unknown URL format. Let oEmbed have a go.
if ( $post_ID && get_option('embed_useoembed') ) {
// Check for a cached result (stored in the post meta)
$cachekey = '_oembed_' . md5( $url . implode( '|', $attr ) );
if ( $this->usecache ) {
$cache = ( $_wp_using_ext_object_cache ) ? wp_cache_get( "{$post_ID}_{$cachekey}", 'oembed' ) : get_post_meta( $post_ID, $cachekey, true );
// Failures are cached
if ( '{{unknown}}' === $cache )
return $this->maybe_make_link( $url );
if ( !empty($cache) )
return $cache;
}
// Use oEmbed to get the HTML
$attr['discover'] = author_can( $post_ID, 'unfiltered_html' );
$html = wp_oembed_get( $url, $attr );
// Cache the result
$cache = ( $html ) ? $html : '{{unknown}}';
if ( $_wp_using_ext_object_cache )
wp_cache_set( "{$post_ID}_{$cachekey}", $cache, 'oembed' );
else
update_post_meta( $post_ID, $cachekey, $cache );
// If there was a result, return it
if ( $html )
return $html;
}
// Still unknown
return $this->maybe_make_link( $url );
}
/**
* Triggers a caching of all oEmbed results.
*
* @param int $post_ID Post ID to do the caching for.
*/
function cache_oembed( $post_ID ) {
$post = get_post( $post_ID );
// post_type check is incase of "save_post" usage
if ( empty($post->ID) || !in_array( $post->post_type, apply_filters( 'embed_cache_oembed_types', array( 'post', 'page' ) ) ) )
return;
// Dump existing caches
$post_metas = get_post_custom_keys( $post->ID );
foreach( $post_metas as $post_meta_key ) {
if ( '_oembed_' == substr( $post_meta_key, 0, 8 ) )
delete_post_meta( $post->ID, $post_meta_key );
}
// Trigger a caching
if ( !empty($post->post_content) ) {
$this->post_ID = $post->ID;
$this->usecache = false;
$content = $this->run_shortcode( $post->post_content );
if ( get_option('embed_autourls') )
$this->autoembed( $content );
$this->usecache = true;
}
}
/**
* Passes any unlinked URLs that are on their own line to {@link WP_Embed::shortcode()} for potential embedding.
*
* @uses WP_Embed::autoembed_callback()
*
* @param string $content The content to be searched.
* @return string Potentially modified $content.
*/
function autoembed( $content ) {
return preg_replace_callback( '|^\s*(https?://[^\s"]+)\s*$|im', array(&$this, 'autoembed_callback'), $content );
}
/**
* Callback function for {@link WP_Embed::autoembed()}.
*
* @uses WP_Embed::shortcode()
*
* @param array $match A regex match array.
* @return string The embed HTML on success, otherwise the original URL.
*/
function autoembed_callback( $match ) {
$oldval = $this->linkifunknown;
$this->linkifunknown = false;
$return = $this->shortcode( array(), $match[1] );
$this->linkifunknown = $oldval;
return "\n$return\n";
}
/**
* Conditionally makes a hyperlink based on an internal class variable.
*
* @param string $url URL to potentially be linked.
* @return string Linked URL or the original URL.
*/
function maybe_make_link( $url ) {
return ( $this->linkifunknown ) ? '<a href="' . esc_attr($url) . '">' . esc_html($url) . '</a>' : $url;
}
}
$wp_embed = new WP_Embed();
/**
* Register an embed handler. This function should probably only be used for sites that do not support oEmbed.
*
* @see WP_Embed::register_handler()
*/
function wp_embed_register_handler( $id, $regex, $callback, $priority = 10 ) {
global $wp_embed;
$wp_embed->register_handler( $id, $regex, $callback, $priority );
}
/**
* Unregister a previously registered embed handler.
*
* @see WP_Embed::unregister_handler()
*/
function wp_embed_unregister_handler( $id, $priority = 10 ) {
global $wp_embed;
$wp_embed->unregister_handler( $id, $priority );
}
/**
* Create default array of embed parameters.
*
* @return array Default embed parameters.
*/
function wp_embed_defaults() {
if ( !empty($GLOBALS['content_width']) )
$theme_width = (int) $GLOBALS['content_width'];
$width = get_option('embed_size_w');
if ( !$width && !empty($theme_width) )
$width = $theme_width;
if ( !$width )
$width = 500;
return apply_filters( 'embed_defaults', array(
'width' => $width,
'height' => 700,
) );
}
/**
* Based on a supplied width/height example, return the biggest possible dimensions based on the max width/height.
*
* @uses wp_constrain_dimensions() This function passes the widths and the heights.
*
* @param int $example_width The width of an example embed.
* @param int $example_height The height of an example embed.
* @param int $max_width The maximum allowed width.
* @param int $max_height The maximum allowed height.
* @return array The maximum possible width and height based on the example ratio.
*/
function wp_expand_dimensions( $example_width, $example_height, $max_width, $max_height ) {
$example_width = (int) $example_width;
$example_height = (int) $example_height;
$max_width = (int) $max_width;
$max_height = (int) $max_height;
return wp_constrain_dimensions( $example_width * 1000000, $example_height * 1000000, $max_width, $max_height );
}
/**
* Attempts to fetch the embed HTML for a provided URL using oEmbed.
*
* @see WP_oEmbed
*
* @uses _wp_oembed_get_object()
* @uses WP_oEmbed::get_html()
*
* @param string $url The URL that should be embeded.
* @param array $args Addtional arguments and parameters.
* @return string The original URL on failure or the embed HTML on success.
*/
function wp_oembed_get( $url, $args = '' ) {
require_once( 'class-oembed.php' );
$oembed = _wp_oembed_get_object();
return $oembed->get_html( $url, $args );
}